diff --git a/examples_ptx/ptxcc/PTXParser.h b/examples_ptx/ptxcc/PTXParser.h
index e3f5b80f..b7fc35e1 100644
--- a/examples_ptx/ptxcc/PTXParser.h
+++ b/examples_ptx/ptxcc/PTXParser.h
@@ -50,8 +50,13 @@ namespace parser
     void printHeader()
     {
       std::stringstream s;
+#if 0
       s << "template<int N> struct __align__(N)   b8_t  { unsigned char  _v[N]; __device__ b8_t()  {}; __device__ b8_t (const int value) {}}; \n";
       s << "template<int N> struct __align__(2*N) b16_t { unsigned short _v[N]; __device__ b16_t() {}; __device__ b16_t(const int value) {}}; \n";
+#else
+      s << "template<int N> struct b8_t  { unsigned char  _v[N]; __device__ b8_t()  {}; __device__ b8_t (const int value) {}}; \n";
+      s << "template<int N> struct b16_t { unsigned short _v[N]; __device__ b16_t() {}; __device__ b16_t(const int value) {}}; \n";
+#endif
       s << "struct b8d_t  { unsigned char  _v[1]; }; \n";
       s << "struct b16d_t { unsigned short _v[1]; }; \n";
 
diff --git a/examples_ptx/ptxgen/Makefile b/examples_ptx/ptxgen/Makefile
index 48b3b7ea..3e47d89e 100644
--- a/examples_ptx/ptxgen/Makefile
+++ b/examples_ptx/ptxgen/Makefile
@@ -1,6 +1,7 @@
 CUDA55 = /usr/local/cuda-5.5
 CUDA60 = /usr/local/cuda-6.0
-
+CUDA55 = /opt/cuda/5.5
+CUDA60 = /opt/cuda/5.5
 all: ptxgen55 ptxgen60
 
 ptxgen60: ptxgen.cpp